EP2345548B1 - Pneumatique - Google Patents

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Publication number
EP2345548B1
EP2345548B1 EP09821883.7A EP09821883A EP2345548B1 EP 2345548 B1 EP2345548 B1 EP 2345548B1 EP 09821883 A EP09821883 A EP 09821883A EP 2345548 B1 EP2345548 B1 EP 2345548B1
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EP
European Patent Office
Prior art keywords
tire
carcass
main body
radial direction
distance
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Not-in-force
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EP09821883.7A
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German (de)
English (en)
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EP2345548A1 (fr
EP2345548A4 (fr
Inventor
Jyunya Asari
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Bridgestone Corp
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Bridgestone Corp
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C15/0635—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer using chippers between the carcass layer and chafer rubber wrapped around the bead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/0061—Accessories, details or auxiliary operations not otherwise provided for
    • B29D2030/0066—Tyre quality control during manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C2015/0646—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer at the axially inner side of the carcass main portion not wrapped around the bead core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10819—Characterized by the structure of the bead portion of the tire
    • Y10T152/10828—Chafer or sealing strips

Definitions

  • the present invention relates to a tire and, in particular, a tire having improved durability of a bead portion.
  • a product life of a tire before being disposed as waste has been significantly prolonged in recent years due to improvement in wear resistance of tread, and the like.
  • the conventional tires have taken measures for addressing troubles such as separation at a bead portion of a tire on the widthwise-outer side of a carcass turn-up portion thereof, separation in a portion covering a carcass main body, of a wire chafer, at the outermost end in the tire radial direction thereof, and the like.
  • JP 2002-219912 and JP 2008-143291 disclose techniques for improving durability against separation on the outer side of a carcass turn-up portion of a tire and durability against separation in a portion covering a carcass main body, of a wire chafer, at the outermost end in the tire radial direction thereof.
  • JP 2002-219912 nor JP 2008-143291 can offer sufficient durability at the outermost end in the tire radial direction of a portion covering a carcass main body, of a textile chafer. Attention is drawn to the disclosure of JP 2007-195212 .
  • an object of the present invention is to provide a tire having improved durability of a bead portion.
  • the inventors of the present invention have discovered, as a result of a keen study of the mechanism of troubles of a bead portion initiated at the outermost end in the tire radial direction of a portion covering a carcass main body, of a textile chafer, that i) in a case where an expansion rate of a textile chafer is relatively large, the textile chafer shrinks during the tire vulcanization process and a crease is generated in an inner liner layer from the outermost end in the tire radial direction of a portion covering a carcass main body, of the textile chafer, due to the shrinkage of the textile chafer; ii) then cracks are generated from the crease as the starting point and coating rubber of a carcass ply deteriorates due to oxygen transmitted through the cracks; and iii) the coating rubber is exfoliated along ply cords of the carcass at the later stage of the product life of the tire, causing troubles of a bead portion.
  • the main structure of the present invention is as follows.
  • a tire having: at least one layer of carcass, including a carcass main body extending in a toroidal shape across a pair of bead cores and a carcass turn-up portion wound around each bead core from the inner side toward the outer side in the tire widthwise direction and extending in the tire radial direction; at least two layers of textile chafer extending from the carcass main body toward the carcass turn-up portion so as to cover the carcass; and at least one layer of wire chafer, characterized in that: in a state where the tire is assembled with a "design rim" prescribed in TRA (The Tire and Rim Association, Inc.,) and inflated at an inner pressure of 50 kPa and providing that the center of a flange curvature of a rim is P and the outer most end in the tire radial direction of a portion covering a carcass main body, of a textile chafer, is A, an angle ⁇ formed by a line passing
  • a method of producing the tire of any one of (1) to (3) above characterized in that: providing that circumference of a circle having: as radius the distance in the tire radial direction between the radial-direction outermost end of a portion covering the carcass main body, of the textile chafer, and the tire axis S; and as the center thereof the intersection of a line drawn from said outermost end to be normal to the tire axis, with the tire axis, after a tire-molding process, is L, and circumference of a circle having: as radius the distance in the tire radial direction between the radial-direction outermost end of a portion covering the carcass main body, of the textile chafer, and the tire axis S; and as the center thereof the intersection of a line drawn from said outermost end to be normal to the tire axis, with the tire axis, after a tire-vulcanization process, is M, an expansion rate of the textile chafer in a period from the tire-molding process to a
  • the center of a flange curvature (having a radius r) of a rim is P and the outer most end in the tire radial direction of a portion covering a carcass main body, of a textile chafer, is A, by setting an angle ⁇ formed by a line passing P and in parallel with the tire rotation axis, with respect to a line linking P and A, in a range of 20° ⁇ ⁇ ⁇ 60°, troubles of a bead portion at the outermost end in the tire radial direction of the portion covering the carcass main body, of the textile chafer, is suppressed and a tire having enhanced durability of a bead portion and a prolonged product life can be provided without adding any new member in the bead portion.
  • a tire has: at least one layer of carcass, including a carcass main body 2 extending in a toroidal shape across a pair of bead cores 1 and a carcass turn-up portion 3 continuous with the carcass main body 2 and wound around each bead core from the inner side toward the outer side in the tire widthwise direction to extend in the tire radial direction; at least two layers of textile chafer 4 disposed on the tire-radial direction inner surface of the carcass with respect to the bead core 1; and at least one layer of wire chafer 5.
  • the tire of the present invention is designed such that, in a state where the tire is assembled with a "design rim" prescribed in TRA (The Tire and Rim Association, Inc.,) and inflated at an inner pressure of 50 kPa, and providing that the center of a flange curvature (having a radius r) of the rim is P and the outer most end in the tire radial direction of a portion covering the carcass main body, of the textile chafer, is A, an angle ⁇ formed by a line passing P and in parallel with the tire rotation axis, with respect to a line linking P and A, is set in a range of 20° ⁇ ⁇ ⁇ 60°, as shown in FIG. 1 .
  • the angle ⁇ is approximately 66° in the conventional tires and, in such conventional cases, generation of a crease may occur in an inner liner layer at the outer most end in the tire radial direction of a portion covering the carcass main body, of the textile chafer. In the tire of the present invention, such a crease as in the conventional cases is hardly generated because the angle ⁇ is set to be not larger than 60°.
  • the angle ⁇ is smaller than 20°, the outer most end in the tire radial direction of a portion covering the carcass main body, of the wire chafer, which is protected by textile chafer, is positioned too low, whereby an effect of suppressing collapse of the tire toward the back face of the flange is reduced and the durability on the outer side in the tire widthwise direction of the carcass turn-up portion is extremely decreased, as disclosed in JP 2002-219912 Laid-Open.
  • the angle ⁇ is in the range of 20° ⁇ ⁇ ⁇ 30°
  • the lower positions of the textile chafer 4 and the wire chafer 5 extending toward the carcass turn-up portion are not particularly restricted.
  • the number of layers of the textile chafer is not particularly restricted, either, as long as the textile chafer is constituted of at least two layers.
  • the center P of the flange curvature of the rim represents the center of curvature at the rear end portion of the flange of the rim.
  • the textile chafer 4 is constituted of parallel-disposed fiber cords and rubber coated thereon.
  • the wire chafer 5 is constituted of parallel-disposed steel cords and rubber coated thereon.
  • the tire of the present invention is preferably designed such that cords of one layer of the textile chafer extend in a direction intersecting cords of another layer of the textile chafer and an angle ⁇ formed by a cord Tc with respect to a line Ts tangent to a circle coaxial with the outer periphery of the tire at a point D on the cord (the circle crosses the cord at the point D) is in the range of 20° ⁇ ⁇ ⁇ 70°, as shown in FIG. 3 .
  • the angle ⁇ exceeds 70° in the textile chafer, the intersection of fiber cords of one layer with those of another layer in the textile chafer cannot make sufficient contribution to increase in rigidity, although shrinkage of the textile chafer during the vulcanization process is suppressed.
  • the angle ⁇ is smaller than 20°, there cannot be obtained a sufficient effect of suppressing an expansion rate of the textile chafer in the tire production process.
  • an expansion rate of the textile chafer in a period from the tire-molding process to the finishing stage (M/L ⁇ 100) is generally suppressed to 110% or lower, whereby a crease will be hardly generated.
  • the method of producing a tire according to the present invention preferably includes setting, providing that circumference of a circle having: as radius the distance in the tire radial direction between the radial-direction outermost end A 0 of the textile chafer and the tire axis S; and as the center thereof the intersection of a line drawn from said outermost end A 0 to be normal to the tire axis S, with the tire axis S, after a tire-molding process, is L, and circumference of a circle having: as radius the distance in the tire radial direction between the radial-direction outermost end A of the textile chafer and the tire axis S; and as the center thereof the intersection of a line drawn from said outermost end A to be normal to the tire axis S, with the tire axis S, after a tire-vulcanization process, is M, an expansion rate of circumference of the textile chafer in a period from the tire-
  • the tire of the present invention is preferably designed such that, providing that: tire section height is SH, rim radius is R, rim flange height of the design rim is Hf; position at the tire outer-side surface, where the distance between said position and the tire rotation shaft in the tire radial direction is (R + 1.18 ⁇ Hf), is P1 and position at the tire outer-side surface, where the distance between said position and the tire rotation shaft in the tire radial direction is (R + 0.81 ⁇ Hf), is P2; crossing-point of a first line drawn from P1 to be normal to the carcass main body, with the carcass turn-up portion, is T1 and crossing-point of a second line drawn from P2 to be normal to the carcass main body, with the carcass turn-up portion, is T2; crossing-point of the first line with the carcass main body is M1 and crossing-point of the second line with the carcass main body is M2; and distance between P1 and T1 is W1pt, distance between T1 and M1 is
  • the tire of the present invention preferably satisfies the aforementioned formula (I) because then durability on the outer side in the tire widthwise direction of the carcass turn-up potion 3 in the vicinity of T1 can be enhanced without increasing the temperature in the vicinity of T1, as compared with the conventional tires. Further, the tire of the present invention preferably satisfies the aforementioned formula (II) because then durability of a rubber layer between the carcass main body and the carcass turn-up portion can be set at the same level as or higher than that of the conventional tires and durability on the outer side in the tire widthwise direction of the carcass turn-up potion 3 in the vicinity of T1 can be enhanced.
  • the tire of the present invention preferably satisfies the aforementioned formula (III) because then durability of the tire against fracture of carcass cords and durability on the outer side in the tire widthwise direction of the carcass turn-up potion 3 in the vicinity of T1 can be both enhanced. Yet further, the tire of the present invention preferably satisfies the aforementioned formula (IV) because there can be obtained a case line of a bead portion, which case line allows the carcass main body 2 and the carcass turn-up potion 3 to be produced without being affected by decrease in W2tm. Accordingly, in the tire of the present invention, it is possible to simultaneously improve three durability values, i.e.
  • the tire of the present invention is not particularly restricted, except that the tire having: at least one layer of carcass, including a carcass main body extending in a toroidal shape across a pair of bead cores and a carcass turn-up portion continuous with the carcass main body and wound around each bead core from the inner side toward the outer side in the tire widthwise direction to extend in the tire radial direction; at least two layers of textile chafer disposed on the tire-radial direction inner surface of the carcass with respect to the bead core; and at least one layer of wire chafer, is characterized in that: in a state where the tire is assembled with a "design rim" prescribed in TRA and inflated at an inner pressure of 50 kPa and, providing that the center of a flange curvature of the rim is P and the outer most end in the tire radial direction of a portion covering the carcass main body, of the textile chafer, is A, an angle ⁇ formed by a line passing P and in parallel with the tire
  • the tire of the present invention can be produced by the known method based on the known tire structure.
  • the tire of the present invention may be either a solid tire or a pneumatic tire.
  • examples of gas with which the tire is to be filled include ambient air, air having adjusted oxygen partial pressure, and inert gas such as nitrogen, argon, helium, and the like.
  • the tire of the present invention can be preferably used as a pneumatic radial tire for heavy load which is relatively susceptible to troubles in a bead portion, and in particular, as a pneumatic radial tire for a construction vehicle.
  • a test tire for a construction vehicle having size: 46/90R57 was produced according to the specifications shown in Table 1.
  • Frequency of crease generation in the inner liner layer at the outermost end in the tire radial direction of a portion covering a carcass main body, of a textile chafer, was measured for the tire for a construction vehicle according to the method described below. The results are shown in Table 1.
  • the inner surface of a tire is visually inspected. In a case where the tire exhibits a crease of which depth exceeds 1 mm, it is judged that a crease has been "generated” in the tire, while in a case where the tire is free of a crease of which depth exceeds 1 mm, it is judged that a crease has "not been generated” in the tire. Frequency of crease generation is calculated based on these evaluation results.
  • Example 1 Tire structure ⁇ (°) 66 63 60 ⁇ (°) 30 30 30 W 1pt (%) (ratio to SH) 5.0 5.0 5.0 W1tm (%) (ratio to SH) 3.3 3.3 3.3 W2tm (%) (ratio to SH) 4.2 42 4.2 W 1pt - W2pt (%) (ratio to SH) 1.8 1.8 1.8 Tire performance Expansion rate M/L (%) 113 111.5 110 Frequency of crease generation (%) 4 2 Not generated
  • a test tire for a construction vehicle having size: 46/90R57 was produced according to the specifications shown in Table 2.
  • the tire was assembled with a design rim (TRA), inflated at the standard inner pressure (TRA), and subjected to a durability test by using a drum having diameter of 5 m under a load which is 170% of the standard load (TRA) to measure a running time before occurrence of separation on the outer side in the tire widthwise direction of the carcass turn-up portion of the tire.
  • the results are shown in Table 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Tires In General (AREA)
  • Tyre Moulding (AREA)

Claims (3)

  1. Bandage pneumatique, comprenant : au moins une couche de carcasse, englobant un corps principal de la carcasse (2), s'étendant dans une forme toroïdale à travers une paire de tringles (1), et une partie retournée de la carcasse (3), enroulée autour de chaque tringle, du côté interne vers le côté externe dans la direction de la largeur du bandage pneumatique, et s'étendant dans la direction radiale du bandage pneumatique ; au moins deux couches de bandelette talon textiles (4), s'étendant du corps principal de la carcasse vers la partie retournée de la carcasse, de sorte à recouvrir la carcasse ; et au moins une couche de bandelette talon métallique (5),
    dans lequel, dans l'état où le bandage pneumatique est assemblé sur une « jante étalon », prescrite dans TRA (The Tire and Rim Association, Inc.,) et gonflé à une pression interne de 50 kPa, et en supposant que le centre d'une courbure du rebord (ayant un rayon r) d'une jante correspond à P, et que l'extrémité externe extrême, dans la direction radiale du bandage pneumatique, d'une partie recouvrant un corps principal de la carcasse, d'une bandelette talon textile, correspond à A, un angle θ formé par une ligne passant par P et parallèle à l'axe de rotation du bandage pneumatique, par rapport à une ligne reliant P et A, est compris dans l'intervalle allant de 20° ≤ θ ≤60° ;
    caractérisé en ce que des câblés d'une couche de la bandelette talon textile s'étendent dans une direction coupant les câblés d'une autre couche de la bandelette textile ; et
    un angle α formé par un câblé (Tc) par rapport à une ligne (Ts), tangentielle à un cercle coaxial à la périphérie externe du bandage pneumatique au niveau d'un point (D) sur le câblé, est compris dans l'intervalle allant de 20° ≤ α ≤70°.
  2. Bandage pneumatique selon la revendication 1, dans lequel, en supposant que :
    l'angle θ est compris dans l'intervalle allant de 20° ≤ θ ≤ 30° ;
    la hauteur de section du bandage pneumatique correspond à SH, le rayon de la jante correspondant à R, la hauteur du rebord de la jante de la jante étalon correspondant à Hf;
    une position au niveau de la surface du côté externe du bandage pneumatique, où la distance entre ladite position et l'arbre de rotation du bandage pneumatique, dans la direction radiale du bandage pneumatique, correspond à (R + 1,18 x Hf), correspond à P1, et une position au niveau de la surface du côté externe du bandage pneumatique, où la distance entre ladite position et l'arbre de rotation du bandage pneumatique, dans la direction radiale du bandage pneumatique, correspond à (R + 0,81 x Hf), correspond à P2 ;
    un point de croisement d'une première ligne tracée à partir de P1, de sorte à être perpendiculaire au corps principal de la carcasse, avec la partie retournée de la carcasse, correspond à T1, et le point de croisement d'une deuxième ligne tracée à partir de P2, de sorte à être perpendiculaire au corps principal de la carcasse, avec la partie retournée de la carcasse, correspond à T2 ;
    le point de croisement de la première ligne avec le corps principal de la carcasse correspond à M1, et le point de croisement de la deuxième ligne avec le corps principal de la carcasse correspond à M2 ; et
    la distance entre P1 et T1 correspond à W1pt, la distance entre T1 et M1 correspondant à W1tm, la distance entre P2 et M2 correspondant à W2pt ; la distance entre T2 et M2 correspondant à W2tm ;
    les paramètres satisfont les formules (I) à (IV) 0 , 053 x SH < W ⁢ 1 ⁢ pt < 0 , 068 x SH
    Figure imgb0013
     0 , 017 x SH < W ⁢ 1 ⁢ tm < 0 , 032 x SH
    Figure imgb0014
     0 , 028 x SH < W ⁢ 2 ⁢ tm < 0 , 043 x SH
    Figure imgb0015
     0 , 010 x SH < W ⁢ 1 ⁢ pt - W ⁢ 2 ⁢ pt < 0 , 030 x SH
    Figure imgb0016
  3. Procédé de production du bandage pneumatique selon les revendications 1 ou 2, caractérisé en ce que :
    supposant que la circonférence d'un cercle ayant : comme rayon, la distance, dans la direction radiale du bandage pneumatique, entre l'extrémité externe extrême dans la direction radiale (Ao) d'une partie recouvrant le corps principal de la carasse, de la bandelette talon textile, et l'axe du bandage pneumatique S ; et comme centre, l'intersection d'une ligne tracée à partir de ladite extrémité externe extrême (Ao), de sorte à être perpendiculaire à l'axe du bandage pneumatique, avec l'axe du bandage pneumatique, après un processus de moulage du bandage pneumatique, correspondant à L, et la circonférence d'un cercle ayant : comme rayon, la distance, dans la direction radiale du bandage pneumatique, entre l'extrémité externe extrême dans la direction radiale (A), d'une partie recouvrant le corps principal de la carcasse, de la bandelette talon textile, et l'axe du bandage pneumatique S ; et comme centre, l'intersection d'une ligne tracée à partir de ladite extrémité externe extrême (A) , de sorte à être perpendiculaire à l'axe du bandage pneumatique, avec l'axe du bandage pneumatique, après un processus de vulcanisation du bandage pneumatique, correspondant à M, un taux d'expansion de la bandelette talon textile pendant une période s'étendant entre le processus de moulage du bandage pneumatique et un stade de finition (M/L x 100) est compris dans l'intervalle allant de 100 à 110%.
EP09821883.7A 2008-10-21 2009-09-03 Pneumatique Not-in-force EP2345548B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008270718A JP5815914B2 (ja) 2008-10-21 2008-10-21 タイヤの製造方法
PCT/JP2009/065420 WO2010047183A1 (fr) 2008-10-21 2009-09-03 Pneumatique

Publications (3)

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EP2345548A1 EP2345548A1 (fr) 2011-07-20
EP2345548A4 EP2345548A4 (fr) 2012-05-02
EP2345548B1 true EP2345548B1 (fr) 2013-06-26

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US (2) US20110192517A1 (fr)
EP (1) EP2345548B1 (fr)
JP (1) JP5815914B2 (fr)
CN (1) CN102224025B (fr)
BR (1) BRPI0920640B1 (fr)
ES (1) ES2425978T3 (fr)
WO (1) WO2010047183A1 (fr)

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CN103419573A (zh) * 2013-08-23 2013-12-04 江苏通用科技股份有限公司 轮胎胎圈结构
DE102014213240A1 (de) * 2014-07-08 2016-01-14 Continental Reifen Deutschland Gmbh Nutzfahrzeugreifen
JP6540343B2 (ja) * 2015-08-04 2019-07-10 住友ゴム工業株式会社 空気入りタイヤ

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JP3090437B2 (ja) * 1998-07-02 2000-09-18 住友ゴム工業株式会社 自動二輪車用タイヤ
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JP2001225618A (ja) * 2000-02-18 2001-08-21 Bridgestone Corp 空気入りラジアルタイヤ
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JP4707842B2 (ja) * 2001-01-24 2011-06-22 株式会社ブリヂストン 重荷重用空気入りラジアルタイヤ
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US7461679B2 (en) * 2005-11-08 2008-12-09 Sumitomo Rubber Industries, Ltd. Heavy duty tire
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EP2345548A1 (fr) 2011-07-20
CN102224025B (zh) 2015-06-17
JP2010100076A (ja) 2010-05-06
BRPI0920640B1 (pt) 2020-02-04
US20140138015A1 (en) 2014-05-22
WO2010047183A1 (fr) 2010-04-29
US20110192517A1 (en) 2011-08-11
ES2425978T3 (es) 2013-10-18
BRPI0920640A2 (pt) 2016-01-12
JP5815914B2 (ja) 2015-11-17
CN102224025A (zh) 2011-10-19
EP2345548A4 (fr) 2012-05-02

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